/*
 *  Copyright 2013 National Institute of Advanced Industrial Science and Technology
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.sss.mapreduce.example;

import org.sss.client.DataGetter;
import org.sss.client.SssClient;
import org.sss.mapreduce.GroupID;
import org.sss.mapreduce.Tuple;
import org.sss.mapreduce.datatype.PackableInt;
import org.sss.mapreduce.datatype.PackableString;

public class WordCountResultPrinter {
  public static void main(String[] args) throws Exception {
    SssClient client = new SssClient(args);

    String[] others = client.getArgs();
    if (others.length < 1) {
      System.err.println("input group id is not specified.");
      System.exit(1);
    }

    GroupID table = GroupID.createFromString(others[0]);
    DataGetter<PackableString, PackableInt> dg = 
      DataGetter.create(client, PackableString.class, PackableInt.class, table);
    try {
      for (Tuple<PackableString, PackableInt> kv: dg) {
        System.out.format("%s -> %d\n", kv.getKey().get(), kv.getValue().get());
      }
    }
    catch (Throwable e) {
      System.err.println("caught an IOException while reading RawKeyValue.");
      e.printStackTrace();
    } finally {
      // don't forget this.
      dg.close();
    }
  }
}
